Exceptional supercapacitive performance of bicontinuous carbon/MnO2 composite electrodes. Issue 12 (15th August 2018)

• Record Type: Journal Article
• Authors: Yang, Wenli; Chen, Qibin; Song, Xuehua; Tan, Huiling; Liu, Honglai
• Is Part Of: Ceramics international. Volume 44:Issue 12(2018)
• Page Start: 13858
• Page End: 13866
• Publication Date: 2018-08-15
• Subjects: Phase separation -- Bicontinuous structure -- Carbon/MnO2 -- Binder-free; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.04.232
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A new type of porous carbon/MnO2 composites, having bicontinuous structures, i.e., continuous channels and carbon skeletons, was prepared using a phase separation method, followed by a carbonization procedure and a subsequent redox reaction. In this work, such composite electrodes show a high specific capacitance of ca. 260 F g −1 at 0.5 A g −1 in 1 M Na2 SO4 aqueous solution, a superior cycling stability (~80% retention after 2000 cycles) and a distinctive high-rate performance. Especially, unique bicontinuous structures endow such composites with a great specific capacitance of the constituent MnO2 (~1100 F g −1 ), very close to the theoretical value. These excellent electrochemical behaviors may render this material a promising candidate as high-performance electrodes in supercapacitors. Therefore, our findings suggest that the strategy for constructing bicontinuous hybrid electrodes represents an exciting direction for designing next-generation supercapacitors.